Agree that you should open light, especially since it's your first meet. You're probably going to be nervous so pick weights for your first attempt that you know you can handle no problem. Use this first meet as a learning experience, and just go have fun. If you enjoy it, there will be plenty more events in the future where you can really see how far you can push it. I've competed in a few events (my last being a couple months ago). I, unlike most of the guys here, actually lift more in a meet than I do in the gym. I think it's a combination with being in my comfort zone and not having my nerves effect me, along with the increase in adrenaline.

If you're current total is 1,150 lbs., then you have a long way to go to reach 1,400. Just keep lifting heavy and, before you know, it you'll surpass that 1,400. It's a marathon, not a sprint. I also agree with the others in that you should focus on your own PR's rather than beating the others in your weight class. As long as you have the mind set of being better than you were yesterday, your numbers will continue to climb, and winning your division will be more like a by-product of your successful broken PR's.

Best wishes in your future competitions!